Air anti-pollution treatment device for dry-mixed mortar production line

Abstract

The invention discloses an air anti-pollution treatment device for a dry-mixed mortar production line, which comprises a spraying collection cylinder with an upper end cover, a negative pressure and spraying assembly and a dust absorption assembly, the negative pressure and spraying assembly is composed of a negative pressure fan, a fan seat, a water storage tank, a booster pump and a plurality of lateral atomization nozzles; and the fan base is used for generating negative pressure in the spraying collecting barrel to adsorb and spray dust and is arranged at the bottom end of the outer side of the spraying collecting barrel. The temperature sensor is matched with the electromagnetic valve to realize automatic shunting of high-temperature dust-containing airflow and normal-temperature dust-containing airflow, the high-temperature airflow enters the dust pretreatment box, the retention time of the high-temperature airflow is prolonged through the baffle plate, pre-cooling is completed through cooperation of the snakelike heat conduction copper pipe and the cooling fan, and the high-temperature airflow can be effectively prevented from directly impacting a pipeline, a spraying nozzle and a sealing part; the overall operation stability and the service life of the equipment are remarkably improved, and the maintenance frequency and the use cost of a production line are reduced.

Description

Technical Field

[0001] This invention relates to the field of building material production technology, and in particular to an air pollution prevention and control device for dry mortar production lines. Background Technology

[0002] During the production of dry mortar, processes such as crushing, screening, mixing, conveying, and discharging generate a large amount of dust. Unorganized dust dispersion not only severely pollutes the workshop environment and harms the health of operators, but also leads to raw material loss, reduces raw material utilization, and increases production and environmental protection costs for enterprises. Currently, the industry commonly uses dust collection devices that combine negative pressure collection and spray dust removal. These devices are simple in structure and have limited functionality, only achieving basic dust removal and failing to meet the actual needs of continuous, high-efficiency, and high-temperature operation in dry mortar production lines.

[0003] In actual production processes, the temperature of dust-laden airflows generated in different stages varies significantly. Existing conventional dust removal equipment lacks differentiated design for this, lacking both automatic diversion of high-temperature dust-laden airflow and effective pre-cooling structures. Direct entry of high-temperature airflow into the dust removal mechanism can easily cause heat aging, deformation, or even damage to critical components such as pipes, seals, and spray nozzles, significantly shortening the equipment's lifespan. Simultaneously, traditional spray structures result in uneven water mist distribution, leading to dry areas on the inner wall of the dust collector. This results in poor dust wetting and settling, easily generating secondary dust, and overall low dust removal efficiency, failing to meet the clean, environmentally friendly, and stable operation requirements of modern dry mortar production lines. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing an air pollution prevention and control device for dry mortar production lines.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] An air pollution control device for a dry mortar production line includes a spray collection cylinder equipped with an upper cover, a negative pressure and spray assembly, and a dust absorption assembly. The negative pressure and spray assembly consists of a negative pressure fan, a fan base, a water storage tank, a booster pump, and several lateral atomizing nozzles. It is used to generate negative pressure in the spray collection cylinder to adsorb and spray dust. The fan base is located at the bottom of the outer side of the spray collection cylinder. The negative pressure fan is fixedly installed on the upper end of the fan base and communicates with the lower end of the spray collection cylinder. The water storage tank is fixedly installed on the side wall of the lower end of the spray collection cylinder. The booster pump is fixedly installed on the upper end of the water storage tank and its inlet is communicated with the water storage tank. Several lateral atomizing nozzles are vertically arranged on the inner wall of the spray collection cylinder. The outlet of the booster pump is connected to a first guide pipe, which is connected to each lateral atomizing nozzle.

[0007] The dust absorption assembly consists of a gas collection hood, a first flexible connecting pipe, a second flexible connecting pipe, a flexible cross-connecting pipe, and a dust pretreatment box. It concentrates the dust-laden airflow into the spray collection cylinder. The first flexible connecting pipe is connected to the gas collection hood, and the second flexible connecting pipe is connected to the upper end of the spray collection cylinder. The dust pretreatment box is connected between the ends of the first and second flexible connecting pipes and is fixedly connected to the spray collection cylinder via a cantilever. The flexible cross-connecting pipe is connected between the middle ends of the first and second flexible connecting pipes. The tail of the gas collection hood is equipped with a diversion mechanism for distinguishing the flow direction of the dust-laden airflow according to temperature. The dust pretreatment box is equipped with a cooling machine for pre-cooling the high-temperature dust-laden airflow.

[0008] Preferably, the diversion mechanism includes a temperature sensor, a first solenoid valve, and a second solenoid valve. The temperature sensor is fixedly installed at the tail of the gas collection hood. The first solenoid valve is installed at the connection between the first flexible connecting pipe and the dust pretreatment box. The second solenoid valve is installed at the connection between the first flexible connecting pipe and the flexible cross-connect pipe. The temperature sensor controls the opening and closing of the first and second solenoid valves through an electrical signal.

[0009] Preferably, the cooling mechanism includes a serpentine heat-conducting copper pipe and a cooling fan. The serpentine heat-conducting copper pipe is embedded in the bottom of the dust pretreatment box, with one end located inside the dust pretreatment box and the other end located outside the dust pretreatment box. The cooling fan is fixedly installed on the side of the cantilever by a bracket, and the air outlet is directly facing the lower end face of the serpentine heat-conducting copper pipe.

[0010] Preferably, the inner wall of the spray collection cylinder is provided with multiple annular guide grooves along the circumference, and each annular guide groove is connected to a lateral atomizing nozzle at a corresponding height, so that the atomized water forms a continuous water film evenly downward along the cylinder wall, thereby improving the dust adhesion and settling efficiency.

[0011] Preferably, the dust pretreatment box is equipped with multiple layers of baffles arranged alternately to extend the residence time of the high-temperature dust-laden airflow in the box, and to achieve sufficient pre-cooling in conjunction with the cooling mechanism.

[0012] Preferably, the water outlet of the booster pump is also connected to a second guide pipe, the upper end of which passes through the upper end cover and extends into the interior of the spray collection cylinder and is connected to a vortex nozzle, the vortex nozzle being fixedly connected to the lower end of the upper end cover.

[0013] Preferably, the vortex nozzle has inclined slots along its circumferential side, and each inclined slot has atomizing nozzles on its end face.

[0014] Preferably, a sealing gasket is provided between the vortex nozzle and the upper end cover, and the sealing gasket is made of high-temperature resistant rubber.

[0015] Preferably, a heat-conducting layer is wrapped around the middle end of the second guide tube, and multiple arc-shaped heat dissipation fins are provided on the outer side of the heat-conducting layer along the longitudinal direction. An air guide plate is fixedly connected to the lower end of the upper side of the dust pretreatment box. The air guide plate is bent and its end extends to the upper end of the arc-shaped heat dissipation fins.

[0016] The present invention has the following beneficial effects:

[0017] 1. This invention uses a temperature sensor in conjunction with a solenoid valve to automatically separate high-temperature and normal-temperature dust-laden airflows. The high-temperature airflow enters the dust pretreatment box, where the residence time is extended by a baffle plate, and pre-cooling is completed by a serpentine heat-conducting copper pipe and a cooling fan. This effectively avoids the high-temperature airflow from directly impacting the pipelines, spray nozzles, and sealing components, preventing components from aging, deforming, and being damaged by heat. This significantly improves the overall operational stability and service life of the equipment, and reduces the maintenance frequency and operating costs of the production line.

[0018] 2. This invention adopts a dual spray structure combining side atomizing nozzles and top swirling mist nozzles, which, together with the annular guide groove on the cylinder wall, form a continuous and uniform downward water film, enabling the water mist to achieve full coverage within the spray collection cylinder without any drying blind spots. This allows for the full wetting, encapsulation, and rapid settling of dust particles of various sizes, suppressing secondary dust generation at the source, significantly improving dust removal efficiency and thoroughness, and meeting the requirements for clean production and environmental emissions in the workshop.

[0019] 3. The present invention sets a heat-conducting layer and arc-shaped heat dissipation fins on the outside of the second guide tube, and uses a wind guide plate to assist in cooling the spray water. This can effectively reduce the water temperature entering the vortex nozzle, avoid the high temperature water flow from affecting the atomization effect, keep the spray water in a better atomization state, further improve the spray uniformity and dust capture ability of the vortex nozzle, and enable the dust removal mechanism to maintain stable and efficient operation under high temperature conditions. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the air pollution prevention and control device for the dry mortar production line proposed in this invention.

[0021] Figure 2 This is a schematic diagram of the internal structure of the dust pretreatment box proposed in this invention;

[0022] Figure 3 This is a schematic diagram of the internal structure of the spray collection cylinder proposed in this invention;

[0023] Figure 4 This is a schematic diagram showing the connection between the second guide pipe and the spray collection cylinder proposed in this invention;

[0024] Figure 5 This is a schematic diagram showing the connection between the second guide tube, the upper end cap, and the vortex nozzle proposed in this invention.

[0025] Figure 6 This is a schematic diagram of the structure of the vortex nozzle proposed in this invention;

[0026] Figure 7 This is a schematic diagram showing the connection between the second guide tube and the arc-shaped fin proposed in this invention;

[0027] Figure 8 This is a schematic diagram showing the positions of the arc-shaped fins and the wind deflector proposed in this invention.

[0028] In the diagram: 1. Spray collection cylinder; 2. Water storage tank; 3. Top cover; 4. Booster pump; 5. First guide pipe; 6. Gas collection hood; 7. First flexible connecting pipe; 8. Second flexible connecting pipe; 9. Dust pretreatment box; 10. Flexible cross-connector; 11. Temperature sensor; 12. First solenoid valve; 13. Second solenoid valve; 14. Cantilever; 15. Cooling fan; 16. Fan base; 17. Negative pressure fan; 18. Serpentine heat-conducting copper pipe; 19. Lateral atomizing nozzle; 20. Second guide pipe; 21. Swirl mist nozzle; 22. Inclined slot; 23. Atomizing nozzle; 24. Heat-conducting layer; 25. Arc-shaped heat dissipation fins; 26. Air guide plate. Detailed Implementation

[0029] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0030] Example 1

[0031] Reference Figure 1-3 The air pollution prevention and control device for the dry mortar production line includes a spray collection cylinder 1 equipped with an upper end cover 3, a negative pressure and spray assembly, and a dust absorption assembly. The negative pressure and spray assembly consists of a negative pressure fan 17, a fan base 16, a water storage tank 2, a booster pump 4, and several lateral atomizing nozzles 19. It is used to generate negative pressure in the spray collection cylinder 1 to adsorb and spray dust. The fan base 16 is located at the bottom of the outer side of the spray collection cylinder 1. The negative pressure fan 17 is fixedly installed on the upper end of the fan base 16 and connected to the lower end of the spray collection cylinder 1. The water storage tank 2 is fixedly installed on the side wall of the lower end of the spray collection cylinder 1. The booster pump 4 is fixedly installed on the upper end of the water storage tank 2 and its inlet end is connected to the water storage tank 2. Several lateral atomizing nozzles 19 are arranged vertically on the inner wall of the spray collection cylinder 1. The outlet end of the booster pump 4 is connected to a first guide pipe 5, which is connected to each lateral atomizing nozzle 19.

[0032] The dust absorption assembly consists of a gas collection hood 6, a first flexible connecting pipe 7, a second flexible connecting pipe 8, a flexible crossover pipe 10, and a dust pretreatment box 9. It concentrates the dust-laden airflow into the spray collection cylinder 1. The first flexible connecting pipe 7 is connected to the gas collection hood 6, the second flexible connecting pipe 8 is connected to the upper end of the spray collection cylinder 1, the dust pretreatment box 9 is connected between the ends of the first flexible connecting pipe 7 and the second flexible connecting pipe 8 and is fixedly connected to the spray collection cylinder 1 through a cantilever 14, and the flexible crossover pipe 10 is connected across the middle of the first flexible connecting pipe 7 and the second flexible connecting pipe 8.

[0033] The tail of the gas collection hood 6 is equipped with a flow diversion mechanism for distinguishing the flow direction of dust-laden airflow based on temperature. The flow diversion mechanism includes a temperature sensor 11, a first solenoid valve 12, and a second solenoid valve 13. The temperature sensor 11 is fixedly installed at the tail of the gas collection hood 6. The first solenoid valve 12 is installed at the connection between the first flexible connecting pipe 7 and the dust pretreatment box 9. The second solenoid valve 13 is installed at the connection between the first flexible connecting pipe 7 and the flexible cross-connect pipe 10. The temperature sensor 11 controls the opening and closing of the first solenoid valve 12 and the second solenoid valve 13 through an electrical signal.

[0034] The dust pretreatment box 9 is equipped with a cooling mechanism for pre-cooling the high-temperature dust-laden airflow. The cooling mechanism includes a serpentine heat-conducting copper pipe 18 and a cooling fan 15. The serpentine heat-conducting copper pipe 18 is embedded in the bottom of the dust pretreatment box 9, with one end located inside the dust pretreatment box 9 and the other end located outside the dust pretreatment box 9. The cooling fan 15 is fixedly installed on the side of the cantilever 14 by a bracket, and the air outlet is directly facing the lower end face of the serpentine heat-conducting copper pipe 18.

[0035] The inner wall of the spray collection cylinder 1 is provided with multiple layers of annular guide grooves along the circumference. Each layer of annular guide grooves is connected to the lateral atomizing nozzles 19 at the corresponding height, so that the atomized water forms a continuous water film evenly downward along the cylinder wall, improving the efficiency of dust adhesion and settling. The dust pretreatment box 9 is provided with multiple layers of baffles inside, which are arranged alternately to extend the residence time of the high-temperature dust-laden airflow in the box, and to achieve sufficient pre-cooling in conjunction with the cooling mechanism.

[0036] In this embodiment, the negative pressure fan 17 is started to create a negative pressure inside the spray collection cylinder 1. Under the action of negative pressure, the air collection hood 6 draws in the dust-laden airflow generated by the dry mortar production line. The temperature sensor 11 at the tail of the air collection hood 6 detects the temperature of the dust-laden airflow in real time and outputs an electrical signal.

[0037] When the dust-laden airflow is at a high temperature, the temperature sensor 11 controls the first solenoid valve 12 to open and the second solenoid valve 13 to close. The high-temperature dust-laden airflow enters the dust pretreatment box 9 through the first flexible connecting pipe 7. The multiple layers of staggered baffles inside the box extend the airflow residence time. Together with the serpentine heat-conducting copper pipe 18 inside the box and the cooling fan 15 on the side of the cantilever 14, the high-temperature airflow is fully pre-cooled.

[0038] When the dust-laden airflow is at room temperature, the temperature sensor 11 controls the second solenoid valve 13 to open and the first solenoid valve 12 to close, and the room temperature dust-laden airflow passes directly through the flexible cross-connector 10 quickly, realizing the automatic diversion and transportation of high temperature and room temperature dust-laden airflow.

[0039] After pre-cooling, both the high-temperature airflow and the normal-temperature airflow converge into the spray collection cylinder 1 through the second flexible connecting pipe. The water in the water storage tank 2 is pressurized by the booster pump 4 and then transported by the first guide pipe to the multi-layer lateral atomizing nozzles 19 on the inner wall of the spray collection cylinder 1. The atomized water forms a continuous water film evenly downward along the cylinder wall through the annular guide groove, spraying the dust-laden airflow inside the cylinder to reduce dust. The dust is fully wetted and wrapped by the water mist and then settles quickly, completing the efficient dust removal. The continuous water film formed by the annular guide groove can avoid the appearance of dry blind spots on the cylinder wall, effectively improving the dust adhesion and settling efficiency, suppressing secondary dust, and ensuring a stable and efficient dust removal process.

[0040] Example 2

[0041] Reference Figure 4-6 The air pollution prevention and control device for the dry mortar production line differs from that in Example 1 in that the water outlet of the booster pump 4 is also connected to a second guide pipe 20. The upper end of the second guide pipe 20 passes through the upper end cover 3 and extends into the spray collection cylinder 1 and is connected to a vortex nozzle 21. The vortex nozzle 21 is fixedly connected to the lower end of the upper end cover 3.

[0042] The vortex nozzle 21 has inclined slots 22 along its circumferential side, and each inclined slot 22 has atomizing nozzles 23 on its end face. A sealing gasket is provided between the vortex nozzle 21 and the upper end cover 3. The sealing gasket is made of high-temperature resistant rubber.

[0043] In this embodiment, a top vortex spray structure is added based on embodiment 1. During operation, the water in the water storage tank 2 is pressurized by the booster pump 4. One path is supplied to the lateral atomizing nozzle 19 through the first guide pipe 5 to form a continuous water film on the cylinder wall, and the other path is transported to the top vortex spray nozzle 21 through the second guide pipe 20. The water flows through the inclined slot 22 and atomizing nozzle 23 around the vortex spray nozzle 21 and is sprayed out at high speed, forming a full-area vortex atomization zone in the upper part of the spray collection cylinder 1, forming a double spraying and double dust collection working state with the water film on the cylinder wall.

[0044] After the dust-laden airflow enters the spray collection cylinder 1, it is first fully enveloped and moistened by the top vortex mist, and then undergoes secondary adsorption and sedimentation through a continuous water film on the cylinder wall, which greatly improves the dust capture and sedimentation efficiency and prevents fine dust from escaping. The high-temperature resistant sealing gasket between the vortex nozzle 21 and the upper end cover 3 can effectively prevent water mist leakage, ensuring reliable sealing under high-temperature conditions, and making the overall dust removal effect more thorough and stable.

[0045] Example 3

[0046] Reference Figure 7-8 The air pollution prevention and treatment device for the dry mortar production line differs from those in Examples 1 and 2 in that a heat-conducting layer 24 is wrapped around the middle of the second guide pipe 20, and multiple arc-shaped heat dissipation fins 25 are provided on the outer side of the heat-conducting layer 24 along the longitudinal direction. An air guide plate 26 is fixedly connected to the lower end of the upper side of the dust pretreatment box 9. The air guide plate 26 is bent and its end extends to the upper end of the arc-shaped heat dissipation fins 25.

[0047] In this embodiment, based on Embodiments 1 and 2, the heat dissipation of the spray water path is further optimized. During operation, the cooling airflow discharged from the dust pretreatment box 9 is directionally guided by the bent air guide plate 26 to the position of the arc-shaped heat dissipation fins 25. The heat carried by the spray water in the second guide pipe 20 is quickly transferred to the multiple arc-shaped heat dissipation fins 25 through the heat-conducting layer 24 wrapped around the pipe, and is efficiently dissipated under the action of directional airflow, thereby continuously reducing the water temperature entering the vortex nozzle 21 and avoiding the high temperature water flow from reducing the atomization quality.

[0048] After being cooled, the spray water is atomized more finely and evenly when sprayed from the vortex nozzle 21 and the side atomizing nozzle 19, forming a stable and efficient dual dust removal environment in the spray collection cylinder 1. This ensures that the equipment can maintain the best spraying effect and the highest dust removal efficiency under long-term high-temperature conditions, further improving the stability of the mechanism and its service life.

[0049] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. An air pollution prevention and control device for a dry mortar production line, comprising a spray collection cylinder (1) equipped with an upper end cover (3), a negative pressure and spray assembly, and a dust absorption assembly, characterized in that: The negative pressure and spraying assembly consists of a negative pressure fan (17), a fan base (16), a water storage tank (2), a booster pump (4), and several lateral atomizing nozzles (19), used to generate negative pressure in the spraying collection cylinder (1) to adsorb and spray dust. The fan base (16) is located at the bottom of the outer side of the spraying collection cylinder (1). The negative pressure fan (17) is fixedly installed on the upper end of the fan base (16) and connected to the lower end of the spraying collection cylinder (1). The water storage tank (2) is fixedly installed on the side wall of the lower end of the spraying collection cylinder (1). The booster pump (4) is fixedly installed on the upper end of the water storage tank (2) and its inlet end is connected to the water storage tank (2). Several lateral atomizing nozzles (19) are vertically arranged on the inner wall of the spraying collection cylinder (1). The outlet end of the booster pump (4) is connected to a first guide pipe (5), and the first guide pipe (5) is connected to each lateral atomizing nozzle (19). The dust absorption assembly consists of a gas collection hood (6), a first flexible connecting pipe (7), a second flexible connecting pipe (8), a flexible cross-connecting pipe (10), and a dust pretreatment box (9). It concentrates the dust-laden airflow into the spray collection cylinder (1). The first flexible connecting pipe (7) is connected to the gas collection hood (6), and the second flexible connecting pipe (8) is connected to the upper end of the spray collection cylinder (1). The dust pretreatment box (9) is connected between the ends of the first flexible connecting pipe (7) and the second flexible connecting pipe (8) and is fixedly connected to the spray collection cylinder (1) through a cantilever (14). The flexible cross-connecting pipe (10) is connected across the middle ends of the first flexible connecting pipe (7) and the second flexible connecting pipe (8). The tail of the gas collection hood (6) is equipped with a diversion mechanism for distinguishing the flow direction of the dust-laden airflow according to the temperature. The dust pretreatment box (9) is equipped with a cooling mechanism for pre-cooling the high-temperature dust-laden airflow.

2. The air pollution prevention and control device for the dry mortar production line according to claim 1, characterized in that: The diversion mechanism includes a temperature sensor (11), a first solenoid valve (12), and a second solenoid valve (13). The temperature sensor (11) is fixedly installed at the tail of the gas collection hood (6). The first solenoid valve (12) is installed at the connection between the first flexible connecting pipe (7) and the dust pretreatment box (9). The second solenoid valve (13) is installed at the connection between the first flexible connecting pipe (7) and the flexible cross-connector (10). The temperature sensor (11) controls the opening and closing of the first solenoid valve (12) and the second solenoid valve (13) through an electrical signal.

3. The air pollution prevention and control device for the dry mortar production line according to claim 1, characterized in that: The cooling mechanism includes a serpentine heat-conducting copper tube (18) and a cooling fan (15). The serpentine heat-conducting copper tube (18) is embedded in the bottom of the dust pretreatment box (9), with one end inside the dust pretreatment box (9) and the other end outside the dust pretreatment box (9). The cooling fan (15) is fixedly installed on the side of the cantilever (14) by a bracket, and the air outlet is directly facing the lower end face of the serpentine heat-conducting copper tube (18).

4. The air pollution prevention and control device for the dry mortar production line according to claim 1, characterized in that: The inner wall of the spray collection cylinder (1) is provided with multiple annular guide grooves along the circumference, and each annular guide groove is connected to the lateral atomizing nozzle (19) at the corresponding height.

5. The air pollution prevention and control device for the dry mortar production line according to claim 1, characterized in that: The dust pretreatment box (9) is equipped with multiple baffles inside, which are arranged alternately on the top and bottom.

6. The air pollution prevention and control device for the dry mortar production line according to claim 1, characterized in that: The water outlet of the booster pump (4) is also connected to a second guide pipe (20). The upper end of the second guide pipe (20) passes through the upper end cover (3) and extends into the spray collection cylinder (1) and is connected to a vortex nozzle (21). The vortex nozzle (21) is fixedly connected to the lower end of the upper end cover (3).

7. The air pollution prevention and control device for the dry mortar production line according to claim 6, characterized in that: The vortex nozzle (21) is provided with inclined slots (22) along the circumferential direction on its side, and the end face of the inclined slots (22) is provided with atomizing nozzles (23).

8. The air pollution prevention and control device for the dry mortar production line according to claim 6, characterized in that: A sealing gasket is provided between the vortex nozzle (21) and the upper end cover (3), and the sealing gasket is made of high temperature resistant rubber.

9. The air pollution prevention and control device for the dry mortar production line according to claim 6, characterized in that: The second guide pipe (20) is wrapped with a heat-conducting layer (24) at the middle end. Multiple arc-shaped heat dissipation fins (25) are provided on the outer side of the heat-conducting layer (24) along the longitudinal direction. A wind guide plate (26) is fixedly connected to the lower end of the upper side of the dust pretreatment box (9). The wind guide plate (26) is bent and its end extends to the upper end of the arc-shaped heat dissipation fins (25).

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